AU597201B2 - Frequency modulator - Google Patents
Frequency modulator Download PDFInfo
- Publication number
- AU597201B2 AU597201B2 AU37962/89A AU3796289A AU597201B2 AU 597201 B2 AU597201 B2 AU 597201B2 AU 37962/89 A AU37962/89 A AU 37962/89A AU 3796289 A AU3796289 A AU 3796289A AU 597201 B2 AU597201 B2 AU 597201B2
- Authority
- AU
- Australia
- Prior art keywords
- variable capacitance
- transistor
- transistors
- feedback capacitors
- feedback
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/10—Angle modulation by means of variable impedance
- H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
- H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode
- H03C3/222—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode using bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1206—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification
- H03B5/1209—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the amplifier having two current paths operating in a differential manner and a current source or degeneration circuit in common to both paths, e.g. a long-tailed pair.
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
- H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
- H03B2200/003—Circuit elements of oscillators
- H03B2200/004—Circuit elements of oscillators including a variable capacitance, e.g. a varicap, a varactor or a variable capacitance of a diode or transistor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
- H03B2200/006—Functional aspects of oscillators
- H03B2200/0098—Functional aspects of oscillators having a balanced output signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/10—Angle modulation by means of variable impedance
- H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
- H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
- H03C3/16—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit in which the active element simultaneously serves as the active element of an oscillator
Landscapes
- Amplitude Modulation (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Transmitters (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63-172121 | 1988-07-11 | ||
JP63172121A JPH0221709A (ja) | 1988-07-11 | 1988-07-11 | 周波数変調器 |
Publications (2)
Publication Number | Publication Date |
---|---|
AU3796289A AU3796289A (en) | 1990-01-11 |
AU597201B2 true AU597201B2 (en) | 1990-05-24 |
Family
ID=15935943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU37962/89A Ceased AU597201B2 (en) | 1988-07-11 | 1989-07-07 | Frequency modulator |
Country Status (7)
Country | Link |
---|---|
US (1) | US4959625A (ja) |
EP (1) | EP0351153B1 (ja) |
JP (1) | JPH0221709A (ja) |
KR (1) | KR920010236B1 (ja) |
AU (1) | AU597201B2 (ja) |
CA (1) | CA1312125C (ja) |
DE (1) | DE68909854T2 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1034233C (zh) * | 1992-09-18 | 1997-03-12 | 中国建筑科学研究院珠海科研设计部 | 闭合拱圈挡土结构及其施工方法 |
US5525937A (en) * | 1992-12-28 | 1996-06-11 | Sony Corporation | Frequency conversion circuit with UHF/VHF common PLL buffer |
JPH07176952A (ja) * | 1993-12-20 | 1995-07-14 | Sony Corp | 発振器 |
DE69416802T2 (de) * | 1993-12-22 | 1999-07-08 | Matsushita Electric Ind Co Ltd | FM Signal-Demodulator |
JP3395482B2 (ja) * | 1995-10-06 | 2003-04-14 | ソニー株式会社 | 発振回路および発振方法 |
DE69718741T2 (de) * | 1996-10-10 | 2003-11-13 | Koninkl Philips Electronics Nv | Integrierter Oszillator und einen solchen Oszillator verwendendes Funktelefon |
JP3938232B2 (ja) * | 1997-11-28 | 2007-06-27 | シャープ株式会社 | ケーブルモデム用チューナ |
US6504443B1 (en) | 2000-05-17 | 2003-01-07 | Nec America, Inc., | Common anode varactor tuned LC circuit |
JP2002359519A (ja) * | 2001-06-01 | 2002-12-13 | Murata Mfg Co Ltd | 電圧制御発振器およびそれを用いた電子装置 |
JP4365575B2 (ja) * | 2002-11-20 | 2009-11-18 | アルプス電気株式会社 | テレビジョンチューナの発振回路 |
DE102012211502B4 (de) | 2012-07-03 | 2015-05-13 | Siemens Aktiengesellschaft | Frequenzmodulator und Magnetresonanztomograph mit einem Frequenzmodulator |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3371288A (en) * | 1965-07-19 | 1968-02-27 | Bell & Howell Co | Period modulation multivibrator circuit |
SU445115A1 (ru) * | 1972-10-04 | 1974-09-30 | Предприятие П/Я Г-4115 | Балансный модул тор |
US4063193A (en) * | 1976-10-12 | 1977-12-13 | National Semiconductor Corporation | Differential transistor pair integrated circuit oscillator with L-C tank circuit |
JPS5842312A (ja) * | 1981-09-07 | 1983-03-11 | Yoshiyuki Goto | 方形波発振器 |
US4602224A (en) * | 1984-12-20 | 1986-07-22 | Nippon Motorola Ltd. | Variable capacitance reactance circuit |
-
1988
- 1988-07-11 JP JP63172121A patent/JPH0221709A/ja active Granted
-
1989
- 1989-07-04 KR KR1019890009478A patent/KR920010236B1/ko not_active IP Right Cessation
- 1989-07-05 US US07/375,418 patent/US4959625A/en not_active Expired - Lifetime
- 1989-07-07 CA CA000605133A patent/CA1312125C/en not_active Expired - Lifetime
- 1989-07-07 AU AU37962/89A patent/AU597201B2/en not_active Ceased
- 1989-07-10 EP EP89306959A patent/EP0351153B1/en not_active Expired - Lifetime
- 1989-07-10 DE DE89306959T patent/DE68909854T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
AU3796289A (en) | 1990-01-11 |
JPH0221709A (ja) | 1990-01-24 |
JPH0549121B2 (ja) | 1993-07-23 |
CA1312125C (en) | 1992-12-29 |
EP0351153A3 (en) | 1990-09-26 |
KR900002536A (ko) | 1990-02-28 |
KR920010236B1 (ko) | 1992-11-21 |
DE68909854D1 (de) | 1993-11-18 |
DE68909854T2 (de) | 1994-02-10 |
US4959625A (en) | 1990-09-25 |
EP0351153A2 (en) | 1990-01-17 |
EP0351153B1 (en) | 1993-10-13 |
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